I am 22 and was offered the NT scan when I had my booking in appointment with a midwife. They told me I didnt have to do it, but they just offer it to everyone anyway. I had the scan done anyway as I wanted to see bub and make sure bub was growing ok, and everything was OK with bub. We had ours at 12w4d and I was absolutely amazed at how much detail we were able to see. We got pics aswell.